<?php
/**
 * Smarty plugin
 *
 * @package Smarty
 * @subpackage PluginsModifier
 */

/**
 * Smarty escape modifier plugin
 *
 * Type:     modifier<br>
 * Name:     escape<br>
 * Purpose:  escape string for output
 *
 * @link http://www.smarty.net/manual/en/language.modifier.count.characters.php count_characters (Smarty online manual)
 * @author Monte Ohrt <monte at ohrt dot com>
 * @param string  $string        input string
 * @param string  $esc_type      escape type
 * @param string  $char_set      character set, used for htmlspecialchars() or htmlentities()
 * @param boolean $double_encode encode already encoded entitites again, used for htmlspecialchars() or htmlentities()
 * @return string escaped input string
 */
function smarty_modifier_escape($string, $esc_type = 'html', $char_set = null, $double_encode = true)
{
	if (!$char_set) {
		$char_set = SMARTY_RESOURCE_CHAR_SET;
	}

	switch ($esc_type) {
		case 'html':
			return htmlspecialchars($string, ENT_QUOTES, $char_set, $double_encode);

		case 'htmlall':
			if (SMARTY_MBSTRING /* ^phpunit */ && empty($_SERVER['SMARTY_PHPUNIT_DISABLE_MBSTRING'])/* phpunit$ */) {
				// mb_convert_encoding ignores htmlspecialchars()
				$string = htmlspecialchars($string, ENT_QUOTES, $char_set, $double_encode);
				// htmlentities() won't convert everything, so use mb_convert_encoding
				return mb_convert_encoding($string, 'HTML-ENTITIES', $char_set);
			}

			// no MBString fallback
			return htmlentities($string, ENT_QUOTES, $char_set, $double_encode);

		case 'url':
			return rawurlencode($string);

		case 'urlpathinfo':
			return str_replace('%2F', '/', rawurlencode($string));

		case 'quotes':
			// escape unescaped single quotes
			return preg_replace("%(?<!\\\\)'%", "\\'", $string);

		case 'hex':
			// escape every byte into hex
			// Note that the UTF-8 encoded character ä will be represented as %c3%a4
			$return = '';
			$_length = strlen($string);
			for ($x = 0; $x < $_length; $x++) {
				$return .= '%' . bin2hex($string[$x]);
			}
			return $return;

		case 'hexentity':
			$return = '';
			if (SMARTY_MBSTRING /* ^phpunit */ && empty($_SERVER['SMARTY_PHPUNIT_DISABLE_MBSTRING'])/* phpunit$ */) {
				require_once(SMARTY_PLUGINS_DIR . 'shared.mb_unicode.php');
				$return = '';
				foreach (smarty_mb_to_unicode($string, SMARTY_RESOURCE_CHAR_SET) as $unicode) {
					$return .= '&#x' . strtoupper(dechex($unicode)) . ';';
				}
				return $return;
			}
			// no MBString fallback
			$_length = strlen($string);
			for ($x = 0; $x < $_length; $x++) {
				$return .= '&#x' . bin2hex($string[$x]) . ';';
			}
			return $return;

		case 'decentity':
			$return = '';
			if (SMARTY_MBSTRING /* ^phpunit */ && empty($_SERVER['SMARTY_PHPUNIT_DISABLE_MBSTRING'])/* phpunit$ */) {
				require_once(SMARTY_PLUGINS_DIR . 'shared.mb_unicode.php');
				$return = '';
				foreach (smarty_mb_to_unicode($string, SMARTY_RESOURCE_CHAR_SET) as $unicode) {
					$return .= '&#' . $unicode . ';';
				}
				return $return;
			}
			// no MBString fallback
			$_length = strlen($string);
			for ($x = 0; $x < $_length; $x++) {
				$return .= '&#' . ord($string[$x]) . ';';
			}
			return $return;

		case 'javascript':
			// escape quotes and backslashes, newlines, etc.
			return strtr($string, array('\\' => '\\\\', "'" => "\\'", '"' => '\\"', "\r" => '\\r', "\n" => '\\n', '</' => '<\/'));

		case 'mail':
			if (SMARTY_MBSTRING /* ^phpunit */ && empty($_SERVER['SMARTY_PHPUNIT_DISABLE_MBSTRING'])/* phpunit$ */) {
				require_once(SMARTY_PLUGINS_DIR . 'shared.mb_str_replace.php');
				return smarty_mb_str_replace(array('@', '.'), array(' [AT] ', ' [DOT] '), $string);
			}
			// no MBString fallback
			return str_replace(array('@', '.'), array(' [AT] ', ' [DOT] '), $string);

		case 'nonstd':
			// escape non-standard chars, such as ms document quotes
			$return = '';
			if (SMARTY_MBSTRING /* ^phpunit */ && empty($_SERVER['SMARTY_PHPUNIT_DISABLE_MBSTRING'])/* phpunit$ */) {
				require_once(SMARTY_PLUGINS_DIR . 'shared.mb_unicode.php');
				foreach (smarty_mb_to_unicode($string, SMARTY_RESOURCE_CHAR_SET) as $unicode) {
					if ($unicode >= 126) {
						$return .= '&#' . $unicode . ';';
					} else {
						$return .= chr($unicode);
					}
				}
				return $return;
			}

			$_length = strlen($string);
			for ($_i = 0; $_i < $_length; $_i++) {
				$_ord = ord(substr($string, $_i, 1));
				// non-standard char, escape it
				if ($_ord >= 126) {
					$return .= '&#' . $_ord . ';';
				} else {
					$return .= substr($string, $_i, 1);
				}
			}
			return $return;

		default:
			return $string;
	}
}

?>